 /*******************************************************************************
  * Copyright (c) 2000, 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.update.internal.operations;

 import org.eclipse.core.runtime.*;
 import org.eclipse.update.configuration.*;
 import org.eclipse.update.core.*;
 import org.eclipse.update.operations.*;

 public class ToggleSiteOperation
     extends Operation
     implements IToggleSiteOperation {

     private IConfiguredSite site;

     public ToggleSiteOperation(IConfiguredSite site) {
         super();
         this.site = site;
     }

     /* (non-Javadoc)
      * @see org.eclipse.update.operations.IOperation#execute(org.eclipse.core.runtime.IProgressMonitor)
      */
     public boolean execute(
         IProgressMonitor monitor,
         IOperationListener listener)
         throws CoreException {
         if (site == null)
             return false;
         boolean oldValue = site.isEnabled();
         site.setEnabled(!oldValue);
         IStatus status = OperationsManager.getValidator().validateCurrentState();
         if (status != null) {
             // revert
 site.setEnabled(oldValue);
             throw new CoreException(status);
         } else {
             try {
                 boolean restartNeeded = SiteManager.getLocalSite().save();
                 OperationsManager.fireObjectChanged(site, ""); //$NON-NLS-1$
 return restartNeeded; // will restart only if changes could not be applied to current config
 } catch (CoreException e) {
                 //revert
 site.setEnabled(oldValue);
                 UpdateUtils.logException(e);
                 throw e;
             }
         }
     }
 }

